body,
html {
  font-family: Arial, Helvetica, sans-serif;
  background: #f8f8f8;
  background-attachment: fixed;
}
.signIU-modal h1 {
  margin: 0.2rem;
  font-size: 1.2rem;
}
.signIU-modal p {
  font-size: 0.8rem;
  line-height: 1.5rem;
  font-weight: 80;
  margin: 1.2rem 0;
  letter-spacing: 0.1rem;
}
.signIU-modal a {
  color: #333;
  font-size: 0.7rem;
  text-decoration: none;
}
.signIU-modal button {
  background: #417dff;
  border-color: #fff;
  border: 1px solid #fff;
  outline: none;
  cursor: pointer;
  width: 8rem;
  border-radius: 8px;
  margin: 0.6rem 0;
  padding: 0.5rem 0;
  font-size: 0.8rem;
  color: white;
  transition: all 100ms ease-in;
}
.signIU-modal {
  display: none; /* 默认隐藏 */
  position: fixed;
  transition: opacity 0.3s ease;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5); /* 半透明黑色背景 */
}
.signIU-container {
  position: sticky;
  left: 20vw;
  top: 10vh;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
  padding: 0.6rem;
  width: 40rem;
  height: 30rem;
  max-width: 100vw;
  min-height: 50vh;
  display: flex;
  flex-direction: row;
}
.gobackBtn,
.closeBtn {
  position: absolute;
  top: 15px;
  cursor: pointer;
}
.gobackBtn {
  left: 20px;
  font-size: 18px;
}
.closeBtn {
  right: 20px;
  font-size: 24px;
}
.signIU-left,
.signIU-right {
  position: relative;
  width: 50%;
  height: 100%;
  transition: all 0.6s ease-in-out;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.signIU-left {
  border-top-left-radius: 10px;
  border-bottom-left-radius: 10px;
}
.signIU-right {
  background: #417dff;
  color: white;
  border-top-right-radius: 10px;
  border-bottom-right-radius: 10px;
}
.form-container {
  position: absolute;
  top: 0;
  height: 100%;
  transition: all 0.5s ease-in;
}
.form-container form {
  background: #fff;
  display: flex;
  flex-direction: column;
  padding: 0 1.8rem;
  height: 100%;
  justify-content: center;
  align-items: center;
}
.social-container {
  margin: 0.6rem 0;
}
.social-container a {
  border: 1px solid #eee;
  border-radius: 50%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin: 0 5px;
  height: 1.8rem;
  width: 1.8rem;
}
.social-container a:hover {
  opacity: 0.8;
}
.form-container input {
  width: 100%;
  height: 2.2rem;
  text-indent: 1rem;
  border: 1px solid #ccc;
  border-left: none;
  border-right: none;
  border-top: none;
  outline: none;
  margin: 0.6rem 0;
}
